JP4595901B2 - Equipment case, watch case and radio clock - Google Patents

Equipment case, watch case and radio clock Download PDF

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Publication number
JP4595901B2
JP4595901B2 JP2006204120A JP2006204120A JP4595901B2 JP 4595901 B2 JP4595901 B2 JP 4595901B2 JP 2006204120 A JP2006204120 A JP 2006204120A JP 2006204120 A JP2006204120 A JP 2006204120A JP 4595901 B2 JP4595901 B2 JP 4595901B2
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Prior art keywords
back cover
case body
case
notch recess
spacer member
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JP2006204120A
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JP2008032446A (en
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純朗 矢野
隆伸 金刺
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Casio Computer Co Ltd
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Casio Computer Co Ltd
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Priority to JP2006204120A priority Critical patent/JP4595901B2/en
Priority to US11/880,639 priority patent/US7639569B2/en
Priority to CNB2007101421741A priority patent/CN100498595C/en
Publication of JP2008032446A publication Critical patent/JP2008032446A/en
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    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B37/00—Cases
    • G04B37/08—Hermetic sealing of openings, joints, passages or slits
    • G04B37/11—Hermetic sealing of openings, joints, passages or slits of the back cover of pocket or wrist watches
    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G21/00—Input or output devices integrated in time-pieces
    • G04G21/04—Input or output devices integrated in time-pieces using radio waves
    • G—PHYSICS
    • G04—HOROLOGY
    • G04R—RADIO-CONTROLLED TIME-PIECES
    • G04R60/00—Constructional details
    • G04R60/06—Antennas attached to or integrated in clock or watch bodies
    • G04R60/10—Antennas attached to or integrated in clock or watch bodies inside cases
    • G04R60/12—Antennas attached to or integrated in clock or watch bodies inside cases inside metal cases

Description

この発明は、機器ケース、腕時計ケースおよび電波時計に関する。   The present invention relates to a device case, a watch case, and a radio timepiece.

例えば、時計においては、標準時刻電波を受信するアンテナを備え、このアンテナで受信した標準時刻電波に基づいて時刻を修正する電波時計が知られている。
このような電波時計では、アンテナの近傍に金属部材があると、このアンテナで発生した磁界が金属部材を通過することで、金属部材に渦電流が流れ、これによりアンテナの受信感度が低下するという問題がある。このため、腕時計型の電波時計では、ケース本体である腕時計ケース内にアンテナを収容した場合、腕時計ケースおよびその裏側に取り付けられる裏蓋が金属製であると、上述した理由により十分な受信感度が得られない。 For example, a timepiece is known that includes an antenna that receives a standard time radio wave and corrects the time based on the standard time radio wave received by the antenna.
In such a radio-controlled timepiece, if there is a metal member in the vicinity of the antenna, the magnetic field generated by the antenna passes through the metal member, causing eddy currents to flow through the metal member, thereby reducing the reception sensitivity of the antenna. There's a problem. For this reason, in the case of a wristwatch-type radio-controlled timepiece, when the antenna is housed in the wristwatch case, which is the case body, if the wristwatch case and the back cover attached to the back side are made of metal, sufficient reception sensitivity can be obtained for the reasons described above. I can't get it.

そこで、従来の電波時計においては、特許文献１に記載されているように、腕時計ケースおよび裏蓋のうち、少なくとも裏蓋を合成樹脂などの非金属で形成することで、腕時計ケース内に収容されたアンテナの受信感度の低下を防いでいる。
特開２００１−３３５７１号 Therefore, in the conventional radio-controlled timepiece, as described in Patent Document 1, at least the back cover of the watch case and the back cover is formed of a non-metal such as a synthetic resin so that it is accommodated in the watch case. This prevents a decrease in the receiving sensitivity of the antenna.
JP 2001-33571 A

しかしながら、このような従来の電波時計では、裏蓋を合成樹脂などの非金属で形成しているため、腕時計ケースおよび裏蓋の双方を金属で形成した場合と比較して、外観や質感、重量感が低下し、高級感に劣るという問題がある。   However, in such a conventional radio-controlled timepiece, the back cover is formed of a non-metal such as a synthetic resin, so that the appearance, texture, and weight are compared to the case where both the watch case and the back cover are formed of metal. There is a problem that the feeling is lowered and the quality is inferior.

この発明が解決しようとする課題は、ケース本体および裏蓋を金属で形成しても、内部に収容されるアンテナの受信感度を低下させることのない機器ケース、腕時計ケースおよび電波時計を提供することである。   The problem to be solved by the present invention is to provide a device case, a wristwatch case, and a radio-controlled timepiece that do not decrease the reception sensitivity of the antenna accommodated therein even if the case main body and the back cover are made of metal. It is.

この発明は、上記課題を解決するために、次のような構成要素を備えている。
なお、各構成要素には、後述する各実施形態の項で説明される各要素に付されている図面の参照番号などを括弧と共に付す。 In order to solve the above problems, the present invention includes the following components.
In addition, the reference numerals of the drawings attached to the respective elements described in the section of each embodiment described later are attached to the respective constituent elements together with parentheses.

請求項１記載の発明は、図９に示すように、内部にアンテナ（９）が収容されると共に、下部内周面に切欠凹部が設けられた金属製のケース本体（３）と、このケース本体の裏側に取り付けられ、外周部が前記切欠凹部に挿入されると共に、外周部の上部に鍔部が外周側に突出して設けられた金属製の裏蓋（６）と、前記ケース本体の前記切欠凹部の内周面に螺合して前記裏蓋を前記ケース本体に押え付けて固定する金属製のリング部材（２１）と、前記ケース本体と前記裏蓋との間、および前記裏蓋と前記リング部材との間の両方に跨って設けられて、その間の絶縁するためのスペーサ部材（４１）と、前記スペース部材より内側の位置で、前記裏蓋の鍔部の上面と前記ケース本体の切欠凹部の下面との間に設けられた防水パッキン（５）とを備えたことを特徴とする機器ケースである。 As shown in FIG. 9 , the invention described in claim 1 includes a metal case main body (3) in which an antenna (9) is housed and a notch recess is provided in a lower inner peripheral surface, and the case. attached to the back side of the body, the outer peripheral portion is inserted into the cutout recess, a metal back cover provided flange portion at the top of the outer peripheral portion is protruded to the outer peripheral side (6), wherein said case body A metal ring member ( 21 ) that is screwed into the inner peripheral surface of the notch recess and presses and fixes the back cover to the case body ; and between the case body and the back cover ; and the back cover; A spacer member ( 41 ) provided across both the ring members and insulating between them, and an upper surface of the collar portion of the back cover and the case body at a position inside the space member Waterproof packing provided between the lower surface of the notch recess (5 ) .

請求項２に記載の発明は、図９に示すように、内部に標準時刻電波を受信するアンテナ（９）及びこのアンテナで受信した標準時刻電波に基づいて時刻修正する時計モジュール（２）が収容されると共に、下部内周面に切欠凹部が設けられた金属製のケース本体（３）と、このケース本体の裏側に取り付けられ、外周部が前記切欠凹部に挿入されると共に、外周部の上部に鍔部が外周側に突出して設けられた金属製の裏蓋（６）と、前記ケース本体の前記切欠凹部の内周面に螺合して前記裏蓋を前記ケース本体に押え付けて固定する金属製のリング部材（２１）と、前記ケース本体と前記裏蓋との間、および前記裏蓋と前記リング部材との間の両方に跨って設けられて、その間を絶縁するためのスペーサ部材（４１）と、前記スペース部材より内側の位置で、前記裏蓋の鍔部の上面と前記ケース本体の切欠凹部の下面との間に設けられた防水パッキン（５）とを備えたことを特徴とする腕時計ケースである。 According to a second aspect of the invention, as shown in FIG. 9, the time receiving clock module (2) is to be modified based on the standard time radio wave received by the antenna (9) and the antenna that receives the standard time radio wave to the inside And a metal case main body (3) provided with a notch recess in the lower inner peripheral surface, and attached to the back side of the case main body , the outer peripheral portion being inserted into the notch concave portion, and the upper portion of the outer peripheral portion A metal back cover (6) provided with a collar projecting to the outer peripheral side, and screwed into the inner peripheral surface of the notch recess of the case main body to press and fix the back cover to the case main body A spacer member for insulating between the ring member ( 21 ) made of metal and between the case body and the back cover and between the back cover and the ring member ( 41 ) and the space member A wristwatch case comprising a waterproof packing (5) provided between the upper surface of the collar portion of the back cover and the lower surface of the notch recess of the case body at a further inner position .

請求項３に記載の発明は、図９に示すように、時計ケース（４０）、この時計ケースの内部に収容された標準時刻電波を受信するためのアンテナ（９）及び前記時計ケースの内部に収容され、前記アンテナで受信した標準時刻電波に基づいて時刻を修正する時計モジュール（２）を有し、前記時計ケースは、下部内周面に切欠凹部が設けられた金属製のケース本体（３）と、このケース本体の裏側に取り付けられ、外周部が前記切欠凹部に挿入されると共に、外周部の上部に鍔部が外周側に突出して設けられた金属製の裏蓋（６）と、前記ケース本体の前記切欠凹部の内周面に螺合して前記裏蓋を前記ケース本体に押え付けて固定する金属製のリング部材（２１）と、前記ケース本体と前記裏蓋との間、および前記裏蓋と前記リング部材との間の両方に跨って設けられて、その間を絶縁するためのスペーサ部材（４１）と、前記スペース部材より内側の位置で、前記裏蓋の鍔部の上面と前記ケース本体の切欠凹部の下面との間に設けられた防水パッキン（５）とを備えていることを特徴とする電波時計である。 As shown in FIG. 9 , the invention described in claim 3 includes a watch case (40), an antenna (9) for receiving a standard time radio wave accommodated in the watch case, and the watch case. A timepiece module (2) that is accommodated and corrects the time based on the standard time radio wave received by the antenna, and the timepiece case is made of a metal case body (3 ) And a metal back cover (6) attached to the back side of the case body, the outer peripheral portion being inserted into the notch recess, and the collar portion protruding to the outer peripheral side at the upper portion of the outer peripheral portion; A metal ring member (21) that is screwed into an inner peripheral surface of the notch recess of the case body and presses and fixes the back cover to the case body; and between the case body and the back cover, And the back cover and the ring member And a spacer member (41) for insulating between the spacer member (41), and an upper surface of the collar portion of the back cover and a lower surface of the notch recess portion of the case body at a position inside the space member. A radio-controlled timepiece having a waterproof packing (5) provided therebetween.

請求項１に記載の発明によれば、スペーサ部材が、ケース本体と裏蓋との間、および裏蓋とリング部材との間の両方に跨って設けられていることにより、スペーサ部材によってケース本体と裏蓋との接触、および裏蓋とリング部材との接触を防ぐことができ、これによりケース本体と裏蓋との間、および裏蓋とリング部材との間を絶縁できるので、これによってもアンテナで発生した磁界によってケース本体と裏蓋とを還流する渦電流を抑制することができるほか、スペーサ部材がケース本体と裏蓋との間、および裏蓋とリング部材との間の両方に跨って設けられるので、スペーサ部材としての部品点数を最小限に抑えることができ、これにより低コスト化を図ることができる According to the invention described in claim 1, the spacer member is between the case body and the back cover, and by provided across both between the back cover and the ring member, the case body by a spacer member Contact with the back cover and between the back cover and the ring member can be prevented , thereby insulating between the case body and the back cover and between the back cover and the ring member. In addition to suppressing the eddy current flowing back between the case body and the back cover due to the magnetic field generated by the antenna, the spacer member straddles between the case body and the back cover and between the back cover and the ring member. Therefore, the number of parts as the spacer member can be minimized, thereby reducing the cost.

請求項２に記載の発明によれば、請求項１に記載の発明と同様、ケース本体および裏蓋を金属で形成しても、内部に収容されるアンテナの受信感度の低下を防ぐことできる腕時計ケースが得られる。 According to the second aspect of the present invention, similar to the first aspect of the invention, even if the case main body and the back cover are made of metal, it is possible to prevent a decrease in reception sensitivity of the antenna accommodated therein. A case is obtained.

請求項３に記載の発明によれば、時計ケースが金属製であっても、内部に収容されたアンテナの受信感度の低下を防ぐことができ、これによりアンテナで受信した標準時刻電波に基づいて時計モジュールの時刻を正確に且つ確実に修正することができる電波時計が得られる。 According to the invention described in claim 3 , even if the watch case is made of metal, it is possible to prevent the reception sensitivity of the antenna housed therein from being lowered, and based on the standard time radio wave received by the antenna. A radio timepiece capable of accurately and reliably correcting the time of the timepiece module is obtained.

（実施形態１）
以下、図１〜図３を参照して、この発明を電波腕時計に適用した実施形態１について説明する。
図１はこの発明の電波腕時計の要部を示した拡大断面図、図２は図１のリング部材を示した平面図、図３は図１の要部を示した拡大断面図である。
この電波時計は、図１に示すように、腕時計ケース１を備えている。 (Embodiment 1)
A first embodiment in which the present invention is applied to a radio wave wristwatch will be described below with reference to FIGS.
1 is an enlarged cross-sectional view showing the main part of the radio-controlled wristwatch according to the present invention, FIG. 2 is a plan view showing the ring member of FIG. 1, and FIG. 3 is an enlarged cross-sectional view showing the main part of FIG.
As shown in FIG. 1, the radio timepiece includes a watch case 1.

この腕時計ケース１は、図１に示すように、上下に開口されて内部に時計モジュール２を収容するケース本体３と、このケース本体３の上部中央部にパッキン４ａを介して装着された時計ガラス４と、ケース本体３の下部に防水パッキン５を介して取り付けられる裏蓋６と、この裏蓋６をケース本体３に固定するためのリング部材７と、ケース本体３と裏蓋６との間を絶縁するためのスペーサ部材８とを備えている。この場合、ケース本体３には、腕時計ケース１を腕に装着するための時計バンド（図示せず）が取り付けられている。   As shown in FIG. 1, the watch case 1 includes a case main body 3 which is opened up and down and accommodates a timepiece module 2 therein, and a watch glass mounted on the upper central portion of the case main body 3 via a packing 4a. 4, a back cover 6 attached to the lower part of the case body 3 via a waterproof packing 5, a ring member 7 for fixing the back cover 6 to the case body 3, and between the case body 3 and the back cover 6 And a spacer member 8 for insulating them. In this case, a watch band (not shown) for attaching the watch case 1 to the arm is attached to the case body 3.

時計モジュール２は、時刻表示部やＬＳＩなどの時計機能に必要な各種の電子部品を備えているほか、標準時刻電波を受信するアンテナ９を備え、このアンテナ９で受信した標準時刻電波に基づいて時刻を修正するように構成されている。この場合、時刻表示部は、指針を運針させて時刻を指示するアナログムーブメント、または時刻などの情報を電気光学的に表示する平面型の表示素子、あるいはアナログムーブメントと表示素子との双方を備えたものである。   The clock module 2 includes various electronic components necessary for clock functions such as a time display unit and an LSI, and also includes an antenna 9 that receives standard time radio waves. Based on the standard time radio waves received by the antenna 9 It is configured to correct the time. In this case, the time display unit includes an analog movement that moves the hands to indicate the time, a flat display element that electro-optically displays information such as time, or both the analog movement and the display element. Is.

アンテナ９は、バーアンテナであり、アモルファスやフェライトなどの比透磁率が高く、導電率が小さい磁性部材で形成された棒状のコアと、このコアの周囲に銅などの導線を巻き付けたコイルとを備え、電波による磁界中に置かれると、その磁界による磁束が周囲空間よりも比透磁率が高いコアに集中してコイルに鎖交し、このコイルに磁束変化を妨げる向きに磁界を発生させるように誘導起電力が生じる構成になっている。   The antenna 9 is a bar antenna, and includes a rod-shaped core formed of a magnetic member having a high relative permeability such as amorphous or ferrite and a low conductivity, and a coil in which a conductor such as copper is wound around the core. When placed in a magnetic field generated by radio waves, the magnetic flux generated by the magnetic field concentrates on the core having a higher relative permeability than the surrounding space and is linked to the coil so that the magnetic field is generated in a direction that prevents the magnetic flux from changing. In this configuration, an induced electromotive force is generated.

また、時計モジュール２の回路構成は、回路全般を制御する制御部と、アンテナ９のコイルに発生した誘導起電力を検出して標準時刻のデータを取り出す受信回路と、発信器に基づいて現在時刻を計時する計時回路とを有し、受信回路で取り出された標準時刻データに基づいて制御部が計時回路による計時時刻を修正すると共に、時刻表示部を制御して修正された現在時刻を指示表示するように構成されている。   The circuit configuration of the timepiece module 2 includes a control unit that controls the entire circuit, a receiving circuit that detects the induced electromotive force generated in the coil of the antenna 9 and extracts standard time data, and the current time based on the transmitter. And a time correction circuit that controls the time by the control circuit based on the standard time data extracted by the receiving circuit, and controls the time display to indicate the corrected current time. Is configured to do.

ところで、ケース本体３は、ステンレスやチタンなどの強度の高い金属で形成されており、このケース本体３の上部外周面には、図１に示すように、装飾用のベゼル１０が取り付けられている。また、このケース本体３の内部における時計ガラス４の下側には、見切り部材１１がケース本体３の内周面に沿って配置されている。また、このケース本体３の下部内周面には、図１に示すように、切欠凹部１２がケース本体３の内周面に沿って連続して設けられており、この切欠凹部１２の内周面には、雌ねじ１３が設けられている。   By the way, the case main body 3 is made of a high strength metal such as stainless steel or titanium, and a decorative bezel 10 is attached to the upper outer peripheral surface of the case main body 3 as shown in FIG. . Further, a parting member 11 is disposed along the inner peripheral surface of the case body 3 below the watch glass 4 inside the case body 3. Further, as shown in FIG. 1, a notch recess 12 is continuously provided along the inner peripheral surface of the case body 3 on the lower inner peripheral surface of the case body 3. A female screw 13 is provided on the surface.

一方、裏蓋６は、ケース本体３と同様、ステンレスやチタンなどの強度の高い金属でほぼ円板状に形成されている。この場合、裏蓋６は、図１および図３に示すように、その外周部がケース本体３の内周面に沿って設けられた切欠凹部１２に挿入すると共に、この外周部の上部に鍔部１４が外周側に突出して設けられ、この鍔部１４の下側における裏蓋６の外周面とケース本体３の切欠凹部１２の内周面との間にリング形状の隙間が設けられるように構成されている。   On the other hand, the back cover 6 is formed in a substantially disk shape with a high-strength metal such as stainless steel or titanium, like the case body 3. In this case, as shown in FIGS. 1 and 3, the back cover 6 is inserted into a notch recess 12 provided on the outer peripheral portion thereof along the inner peripheral surface of the case body 3, and at the top of the outer peripheral portion. The portion 14 is provided so as to protrude to the outer peripheral side, and a ring-shaped gap is provided between the outer peripheral surface of the back cover 6 and the inner peripheral surface of the notch recess 12 of the case body 3 on the lower side of the flange portion 14. It is configured.

リング部材７は、合成樹脂やセラミックなどの非金属からなり、図１〜図３に示すように、全体がリング形状に形成され、その外周面に雄ねじ１５が設けられ、この雄ねじ１５がケース本体３の切欠凹部１２の内周面に設けられた雌ねじ１３に螺合することにより、裏蓋６の外周面とケース本体３の切欠凹部１２の内周面との間に設けられたリング形状の隙間に挿入して、裏蓋６の鍔部１４をケース本体３の切欠凹部１２の下面に押し付けて固定するように構成されている。   The ring member 7 is made of non-metal such as synthetic resin or ceramic, and as shown in FIGS. 1 to 3, the ring member 7 is entirely formed in a ring shape, and a male screw 15 is provided on the outer peripheral surface thereof. The ring-shaped ring provided between the outer peripheral surface of the back cover 6 and the inner peripheral surface of the notch recess 12 of the case main body 3 by screwing into a female screw 13 provided on the inner peripheral surface of the notch recess 12 of FIG. It is configured to be inserted into the gap and to press and fix the flange 14 of the back cover 6 against the lower surface of the notch recess 12 of the case body 3.

この場合、裏蓋６の鍔部１４の上面とケース本体３の切欠凹部１２の下面との間には、図１および図３に示すように、スペーサ部材８と防水パッキン５とが設けられている。スペーサ部材８は、絶縁性を有する平板状のリングであり、裏蓋６の鍔部１４における外周側の上面とケース本体３の切欠凹部１２における外周側の下面との間に配置され、金属製のケース本体３と金属製の裏蓋６との電気的な絶縁を図るように構成されている。   In this case, a spacer member 8 and a waterproof packing 5 are provided between the upper surface of the collar portion 14 of the back cover 6 and the lower surface of the cutout recess 12 of the case body 3 as shown in FIGS. Yes. The spacer member 8 is a flat ring having an insulating property, and is disposed between the upper surface on the outer peripheral side of the collar portion 14 of the back cover 6 and the lower surface on the outer peripheral side of the cutout recess 12 of the case body 3. The case main body 3 and the metal back cover 6 are configured to be electrically insulated.

防水パッキン５は、ゴムなどの絶縁性材料からなり、全体がリング形状に形成され、図１および図３に示すように、ケース本体３の切欠凹部１２の下面にリング状に連続して形成された凹溝１６内に配置され、その下端面が裏蓋６の鍔部１４の上面に圧接し、これによりケース本体３と裏蓋６との間の防水を図るように構成されている。この場合、裏蓋６の鍔部１４の上面とケース本体３の切欠凹部１２の下面とは、防水リング５およびスペーサ部材８によって、相互に接触しないようになっている。   The waterproof packing 5 is made of an insulating material such as rubber, and is formed in a ring shape as a whole. As shown in FIGS. 1 and 3, the waterproof packing 5 is continuously formed in a ring shape on the lower surface of the notch recess 12 of the case body 3. It is arranged in the recessed groove 16, and the lower end surface thereof is in pressure contact with the upper surface of the flange portion 14 of the back cover 6, and thereby the waterproof between the case body 3 and the back cover 6 is achieved. In this case, the upper surface of the flange portion 14 of the back cover 6 and the lower surface of the cutout recess 12 of the case body 3 are not in contact with each other by the waterproof ring 5 and the spacer member 8.

このような腕時計ケース１によれば、内部にアンテナ９が収容される金属製のケース本体３の内周面にリング部材７を螺合させることにより、金属製の裏蓋６の鍔部１４を金属製のケース本体３における切欠凹部１２の下面に押し付けて固定する際に、ケース本体３の切欠凹部１２の下面と裏蓋６の鍔部１４の上面との間にスペーサ部材８を設けてケース本体３と裏蓋３との間の絶縁を図っているので、ケース本体３内のアンテナ９が電波を受信して磁界を発生するときに、アンテナ９で発生した磁界がケース本体３および裏蓋６を通過することによって発生する渦電流、つまりケース本体３と裏蓋６とを還流する渦電流を抑制することができ、これによりケース本体３および裏蓋６を金属で形成しても、内部に収容されるアンテナ９の受信感度の低下を防ぐことができる。   According to such a watch case 1, the ring member 7 is screwed onto the inner peripheral surface of the metal case main body 3 in which the antenna 9 is accommodated, so that the flange portion 14 of the metal back cover 6 is attached. A spacer member 8 is provided between the lower surface of the notch recess 12 of the case body 3 and the upper surface of the collar portion 14 of the case back 6 when the metal case body 3 is pressed and fixed to the lower surface of the notch recess 12. Since the insulation between the main body 3 and the back cover 3 is intended, when the antenna 9 in the case main body 3 receives a radio wave and generates a magnetic field, the magnetic field generated by the antenna 9 is generated by the case main body 3 and the back cover. 6, that is, an eddy current flowing back through the case body 3 and the back cover 6 can be suppressed, and even if the case body 3 and the back cover 6 are made of metal, Reception of antenna 9 housed in It is possible to prevent a decrease in degree.

この場合、リング部材７は合成樹脂やセラミックなどの非金属で形成されていることにより、金属製のケース本体３と金属製の裏蓋６とがリング部材７を介して導通するのを防ぐことができ、これによりケース本体３と裏蓋６との間を確実に絶縁することができるので、これによってもアンテナ９に発生した磁界によってケース本体３と裏蓋６とを還流する渦電流を抑制することができる。また、裏蓋６の外周部に鍔部１４が設けられ、ケース本体３に鍔部１４を含む裏蓋６の外周部分が挿入する切欠凹部１２が設けられていることにより、リング部材７によって裏蓋６の鍔部１４をケース本体３の切欠凹部１２の下面に確実に押し付けて固定することができる共に、裏蓋６をケース本体３にコンパクトに取り付けることができ、これによりケース全体の小型化をも図ることができる。   In this case, the ring member 7 is formed of a non-metal such as synthetic resin or ceramic, thereby preventing the metal case body 3 and the metal back cover 6 from conducting through the ring member 7. As a result, the case body 3 and the back cover 6 can be surely insulated from each other, so that the eddy current flowing back between the case body 3 and the back cover 6 by the magnetic field generated in the antenna 9 is also suppressed. can do. In addition, a collar 14 is provided on the outer periphery of the back cover 6, and a notch recess 12 into which the outer periphery of the back cover 6 including the collar 14 is inserted is provided on the case body 3. The flange 14 of the lid 6 can be securely pressed and fixed to the lower surface of the notch recess 12 of the case body 3, and the back lid 6 can be compactly attached to the case body 3, thereby reducing the size of the entire case. Can also be achieved.

なお、上記実施形態１では、裏蓋６とケース本体３との間にスペーサ部材８を設けた場合について述べたが、これに限らず、例えば図４に示す変形例のように、防水パッキン５によって裏蓋６の鍔部１４の上面とケース本体３の切欠凹部１２の下面とが相互に接触しないように、裏蓋６の鍔部１４の上面とケース本体３の切欠凹部１２の下面との間に隙間を設けて絶縁を図るように構成しても良い。このように構成すれば、防水パッキン５がスペーサ部材８としての絶縁機能をも兼ね備えることができるので、別部品としてのスペーサ部材８が不要になり、部品点数を削減することができると共に、組立て作業の簡素化を図ることができ、これにより低コスト化を図ることができる。   In the first embodiment, the case where the spacer member 8 is provided between the back cover 6 and the case main body 3 has been described. However, the present invention is not limited thereto, and the waterproof packing 5 is provided as in a modification shown in FIG. Therefore, the upper surface of the collar 14 of the back cover 6 and the lower surface of the notch recess 12 of the case body 3 are prevented from contacting each other. You may comprise so that a clearance may be provided between them and insulation may be aimed at. If comprised in this way, since the waterproof packing 5 can also have the insulation function as the spacer member 8, the spacer member 8 as another component becomes unnecessary, and while being able to reduce a number of parts, assembly work Can be simplified, thereby reducing the cost.

（実施形態２）
次に、図５を参照して、この発明を適用した電波腕時計の実施形態２について説明する。なお、図１〜図３に示された実施形態１と同一部分には同一符号を付して説明する。
この電波腕時計の腕時計ケース２０は、リング部材２１を金属で形成し、このリング部材２１と裏蓋６との間に絶縁性を有する補助スペーサ部材２２を設けた構成で、これ以外は実施形態１と同じ構成なっている。 (Embodiment 2)
Next, with reference to FIG. 5, Embodiment 2 of the radio-controlled wristwatch to which the present invention is applied will be described. In addition, the same code | symbol is attached | subjected and demonstrated to the same part as Embodiment 1 shown by FIGS. 1-3.
The wristwatch case 20 of this radio-controlled wristwatch has a structure in which a ring member 21 is formed of metal and an auxiliary spacer member 22 having an insulating property is provided between the ring member 21 and the back cover 6. It has the same configuration as

すなわち、リング部材２１は、ケース本体３および裏蓋６と同様、ステンレスやチタンなどの強度の高い金属からなり、全体がリング形状に形成され、その外周面に雄ねじ１５が設けられ、この雄ねじ１５がケース本体３の切欠凹部１２の内周面に設けられた雌ねじ１３に螺合することにより、図５に示すように、リング部材２１の内周面が裏蓋６の外周面に接触することがなく、裏蓋６の外周面とケース本体３の切欠凹部１２の内周面との間に設けられたリング形状の隙間に挿入し、これにより裏蓋６の鍔部１４をケース本体３の切欠凹部１２の下面に押し付けて固定するように構成されている。   That is, the ring member 21 is made of a high-strength metal such as stainless steel or titanium, like the case body 3 and the back cover 6, and is formed in a ring shape as a whole, and is provided with a male screw 15 on its outer peripheral surface. Is engaged with the internal thread 13 provided on the inner peripheral surface of the cutout recess 12 of the case body 3, so that the inner peripheral surface of the ring member 21 contacts the outer peripheral surface of the back cover 6 as shown in FIG. And inserted into a ring-shaped gap provided between the outer peripheral surface of the back cover 6 and the inner peripheral surface of the notch recess 12 of the case body 3, whereby the flange 14 of the back cover 6 is inserted into the case body 3. It is comprised so that it may press on the lower surface of the notch recessed part 12, and may be fixed.

補助スペーサ部材２２は、図５に示すように、絶縁性を有する平板状のリングであり、リング部材２１の上面と裏蓋６の鍔部１４の下面との間に配置され、金属製のリング部材２１と金属製の裏蓋６との電気的な絶縁を図るように構成されている。なお、この場合にも、裏蓋６の鍔部１４の上面とケース本体３の切欠凹部１２の下面との間には、図５に示すように、スペーサ部材８と防水パッキン５とが設けられている。スペーサ部材８は、金属製のケース本体３と金属製の裏蓋６との電気的な絶縁を図り、また防水パッキン５は、ケース本体３と裏蓋６との間の防水を図っている。   As shown in FIG. 5, the auxiliary spacer member 22 is a flat ring having an insulating property, and is disposed between the upper surface of the ring member 21 and the lower surface of the collar portion 14 of the back cover 6, and is made of a metal ring. The member 21 is configured to be electrically insulated from the metal back cover 6. Also in this case, a spacer member 8 and a waterproof packing 5 are provided between the upper surface of the collar portion 14 of the back cover 6 and the lower surface of the notch recess 12 of the case body 3 as shown in FIG. ing. The spacer member 8 provides electrical insulation between the metal case main body 3 and the metal back cover 6, and the waterproof packing 5 provides water resistance between the case main body 3 and the back cover 6.

このような腕時計ケース２０においても、実施形態１と同様、ケース本体３の切欠凹部１２の下面と裏蓋６の鍔部１４の上面との間にスペーサ部材８が設けられているほか、特に裏蓋６の鍔部１４の下面とリング部材２１の上面との間に絶縁性の補助スペーサ部材２２が設けられているので、リング部材２１を金属で形成しても、絶縁性の補助スペーサ部材２２によってケース本体３と裏蓋６とがリング部材２１を介して導通するのを防ぐことができ、これによってもアンテナ９に発生した磁界によってケース本体３と裏蓋６とを還流する渦電流を抑制することができるので、ケース本体３、裏蓋６、およびリング部材２１を全て金属で形成しても、内部に収容されるアンテナ９の受信感度の低下を防ぐことができる。   In such a watch case 20 as well as the first embodiment, the spacer member 8 is provided between the lower surface of the notch recess 12 of the case body 3 and the upper surface of the collar portion 14 of the back cover 6, and in particular the back surface. Since the insulating auxiliary spacer member 22 is provided between the lower surface of the flange portion 14 of the lid 6 and the upper surface of the ring member 21, the insulating auxiliary spacer member 22 is formed even if the ring member 21 is formed of metal. Can prevent the case body 3 and the back cover 6 from being conducted through the ring member 21, and this also suppresses the eddy current flowing back through the case body 3 and the back cover 6 by the magnetic field generated in the antenna 9. Therefore, even if the case main body 3, the back cover 6, and the ring member 21 are all formed of metal, it is possible to prevent a decrease in reception sensitivity of the antenna 9 accommodated therein.

なお、上記実施形態２では、裏蓋６とケース本体３との間にスペーサ部材８を設けた場合について述べたが、これに限らず、例えば図６に示す第１変形例のように、防水パッキン５によって裏蓋６の鍔部１４の上面とケース本体３の切欠凹部１２の下面とが相互に接触しないように、裏蓋６の鍔部１４の上面とケース本体３の切欠凹部１２の下面との間に隙間を設けて絶縁を図るようにしても良い。   In the second embodiment, the case where the spacer member 8 is provided between the back cover 6 and the case main body 3 has been described. However, the present invention is not limited to this. For example, as in the first modification shown in FIG. The upper surface of the flange portion 14 of the back cover 6 and the lower surface of the notch recess portion 12 of the case body 3 are prevented by the packing 5 from contacting the upper surface of the flange portion 14 of the back cover 6 and the lower surface of the notch recess portion 12 of the case body 3. Insulation may be achieved by providing a gap therebetween.

また、図７に示す第２変形例のように、防水パッキン２４を平板状のリング形状に形成して裏蓋６とケース本体３との間に配置することにより、裏蓋６の鍔部１４の上面とケース本体３の切欠凹部１２の下面とが相互に接触しないように、裏蓋６の鍔部１４の上面とケース本体３の切欠凹部１２の下面との間に隙間を設けて絶縁を図るようにしても良い。   Further, as in the second modification shown in FIG. 7, the waterproof packing 24 is formed in a flat ring shape and disposed between the back cover 6 and the case body 3, so that the flange portion 14 of the back cover 6 is provided. Insulation is provided by providing a gap between the upper surface of the flange 14 of the back cover 6 and the lower surface of the notch recess 12 of the case body 3 so that the upper surface of the case body 3 and the lower surface of the notch recess 12 of the case body 3 do not contact each other. You may make it show.

このような第１、第２変形例においても、実施形態２と同様の作用効果があるほか、特に図４に示した実施形態１の変形例と同様、防水パッキン５または２４がスペーサ部材８としての絶縁機能をも兼ね備えることができるので、別部品としてのスペーサ部材８が不要になり、部品点数を削減することができると共に、組立て作業の簡素化を図ることができ、これにより低コスト化を図ることができる。   In the first and second modified examples, the same effects as in the second embodiment are obtained, and the waterproof packing 5 or 24 is used as the spacer member 8 as in the modified example of the first embodiment shown in FIG. Therefore, the spacer member 8 as a separate part is not necessary, the number of parts can be reduced, and the assembling work can be simplified, thereby reducing the cost. Can be planned.

（実施形態３）
次に、図８を参照して、この発明を適用した電波腕時計の実施形態３について説明する。この場合には、図５に示された実施形態２と同一部分に同一符号を付して説明する。
この電波腕時計の腕時計ケース３０は、リング部材３１を金属で形成し、このリング部材３１に裏蓋６の鍔部１４が挿入する段差凹部３２を設けた構成で、これ以外は実施形態２とほぼ同じ構成なっている。 (Embodiment 3)
Next, with reference to FIG. 8, Embodiment 3 of the radio-controlled wristwatch to which the present invention is applied will be described. In this case, the same parts as those in the second embodiment shown in FIG.
The wristwatch case 30 of this radio-controlled wristwatch has a configuration in which a ring member 31 is formed of metal and a step recess 32 into which the collar portion 14 of the back cover 6 is inserted is provided in the ring member 31. It has the same configuration.

すなわち、このリング部材３１は、実施形態２と同様、ステンレスやチタンなどの強度の高い金属からなり、全体がリング形状に形成されている。この場合、リング部材３１は、その高さがケース本体３の切欠凹部１２の深さ、つまり裏蓋６の下面から鍔部１４の上面までの高さと同じ大きさに形成されている。このリング部材３１の外周面には、雄ねじ１５が設けられていると共に、リング部材３１の内周面には、図８に示すように、裏蓋６の鍔部１４が挿入する段差凹部３２がリング部材３１の全周に沿って設けられている。   That is, the ring member 31 is made of a high-strength metal such as stainless steel or titanium as in the second embodiment, and is entirely formed in a ring shape. In this case, the height of the ring member 31 is the same as the depth of the cutout recess 12 of the case body 3, that is, the height from the lower surface of the back cover 6 to the upper surface of the flange 14. A male thread 15 is provided on the outer peripheral surface of the ring member 31, and a stepped recess 32 into which the collar portion 14 of the back cover 6 is inserted is formed on the inner peripheral surface of the ring member 31 as shown in FIG. 8. It is provided along the entire circumference of the ring member 31.

これにより、リング部材３１は、雄ねじ１５がケース本体３の切欠凹部１２の内周面に設けられた雌ねじ１３に螺合することにより、図８に示すように、リング部材３１の内周面が裏蓋６の外周面に接触することがなく、しかもリング部材３１の段差凹部３２の内周面が裏蓋６の鍔部１４の外周面にも接触することがなく、この状態で裏蓋６の外周面とケース本体３の切欠凹部１２の内周面との間に設けられたリング形状の隙間に挿入し、これによりリング部材３１の段差凹部３２の上面が裏蓋６の鍔部１４をケース本体３の切欠凹部１２の下面に押し付けて固定するように構成されている。   Thereby, as shown in FIG. 8, the ring member 31 has an inner peripheral surface of the ring member 31 that is engaged with the female screw 13 provided on the inner peripheral surface of the cutout recess 12 of the case body 3. There is no contact with the outer peripheral surface of the back cover 6, and the inner peripheral surface of the stepped recess 32 of the ring member 31 does not contact with the outer peripheral surface of the collar portion 14 of the back cover 6. Is inserted into a ring-shaped gap provided between the outer peripheral surface of the case body 3 and the inner peripheral surface of the cutout recess 12 of the case body 3, whereby the upper surface of the stepped recess 32 of the ring member 31 causes the flange 14 of the back cover 6 to be The case main body 3 is configured to be pressed against and fixed to the lower surface of the cutout recess 12.

この場合にも、リング部材３１の段差凹部３２の上面と裏蓋６の鍔部１４の下面との間には、絶縁性を有する補助スペーサ部材２２が配置されており、裏蓋６の鍔部１４の上面とケース本体３の切欠凹部１２の下面との間には、スペーサ部材８と防水パッキン５とが設けられている。補助スペーサ部材２２は、リング部材３１と裏蓋６との電気的な絶縁を図り、またスペーサ部材８は、金属製のケース本体３と金属製の裏蓋６との電気的な絶縁を図り、さらに防水パッキン５は、ケース本体３と裏蓋６との間の防水を図っている。   Also in this case, the auxiliary spacer member 22 having an insulating property is disposed between the upper surface of the stepped recess 32 of the ring member 31 and the lower surface of the flange portion 14 of the back cover 6. A spacer member 8 and a waterproof packing 5 are provided between the upper surface of 14 and the lower surface of the cutout recess 12 of the case body 3. The auxiliary spacer member 22 provides electrical insulation between the ring member 31 and the back cover 6, and the spacer member 8 provides electrical insulation between the metal case body 3 and the metal back cover 6, Further, the waterproof packing 5 is designed to waterproof between the case body 3 and the back cover 6.

このような腕時計ケース３０においても、実施形態２と同様、ケース本体３と裏蓋６との間にスペーサ部材８が設けられているほか、裏蓋６とリング部材２１との間に絶縁性の補助スペーサ部材２２が設けられているので、実施形態２と同様、アンテナ９で発生した磁界がケース本体３および裏蓋６を通過することによって発生する渦電流、つまりケース本体３と裏蓋６とを還流する渦電流を抑制することができ、これによりケース本体３、裏蓋６、およびリング部材３１を全て金属で形成しても、内部に収容されるアンテナ９の受信感度の低下を防ぐことができる。   In such a watch case 30 as well as in the second embodiment, a spacer member 8 is provided between the case body 3 and the back cover 6, and an insulating property is provided between the back cover 6 and the ring member 21. Since the auxiliary spacer member 22 is provided, the eddy current generated when the magnetic field generated by the antenna 9 passes through the case body 3 and the back cover 6, that is, the case body 3 and the back cover 6, as in the second embodiment. Eddy current that circulates in the air can be suppressed, and even if the case body 3, the back cover 6, and the ring member 31 are all made of metal, it is possible to prevent a decrease in reception sensitivity of the antenna 9 accommodated therein. Can do.

特に、この腕時計ケース３０では、リング部材３１がケース本体３の切欠凹部１２の深さと同じ高さで形成され、このリング部材３１に裏蓋６の鍔部１４が挿入する段差凹部３２を設けているので、リング部材３１の外周面に雄ねじ１５を十分に長く形成することができ、これによりケース本体３に対するリング部材３１の螺合面積を大きくすることができるので、リング部材３１によって裏蓋６をケース本体３に確実に且つ強固に固定することができると共に、裏蓋６をケース本体３にコンパクトに取り付けることができ、これによりケース全体の小型化をも図ることができる。   In particular, in the wristwatch case 30, the ring member 31 is formed at the same height as the depth of the notch recess 12 of the case body 3, and the step recess 32 into which the collar portion 14 of the back cover 6 is inserted is provided in the ring member 31. Therefore, the male screw 15 can be formed sufficiently long on the outer peripheral surface of the ring member 31, thereby increasing the screwing area of the ring member 31 with respect to the case body 3. Can be securely and firmly fixed to the case main body 3, and the back cover 6 can be compactly attached to the case main body 3, thereby reducing the size of the entire case.

なお、上記実施形態１〜３およびその各変形例では、スペーサ部材８および補助スペーサ部材２２が裏蓋６の外周に沿って連続するリング形状に形成されている場合について述べたが、これに限らず、例えばスペーサ部材８および補助スペーサ部材２２を裏蓋６の外周に沿って部分的に設けた構成でも良い。このようにスペーサ部材８および補助スペーサ部材２２を部分的に設けた構成であっても、ケース本体３と裏蓋６との相互の接触、および裏蓋６とリング部材２１、３１との相互の接触を防いで、ケース本体３と裏蓋６との間、および裏蓋６とリング部材２１、３１との間に隙間を部分的に設けることができ、これによりケース本体３と裏蓋６との間、および裏蓋６とリング部材２１、３１との間の絶縁を図ることができる。   In the first to third embodiments and the modifications thereof, the case where the spacer member 8 and the auxiliary spacer member 22 are formed in a continuous ring shape along the outer periphery of the back cover 6 is described. For example, the spacer member 8 and the auxiliary spacer member 22 may be partially provided along the outer periphery of the back cover 6. Thus, even in the configuration in which the spacer member 8 and the auxiliary spacer member 22 are partially provided, mutual contact between the case body 3 and the back cover 6, and mutual connection between the back cover 6 and the ring members 21 and 31. It is possible to prevent the contact, and to partially provide a gap between the case body 3 and the back cover 6 and between the back cover 6 and the ring members 21 and 31, whereby the case body 3 and the back cover 6 And between the back cover 6 and the ring members 21 and 31 can be achieved.

（実施形態４）
次に、図９を参照して、この発明を適用した電波腕時計の実施形態４について説明する。この場合にも、図５に示された実施形態２と同一部分に同一符号を付して説明する。
この電波腕時計の腕時計ケース４０は、裏蓋６の鍔部１４の先端外周部に絶縁性を有するスペーサ部材４１を設けた構成で、これ以外は実施形態２とほぼ同じ構成なっている。 (Embodiment 4)
Next, with reference to FIG. 9, Embodiment 4 of the radio-controlled wristwatch to which the present invention is applied will be described. Also in this case, the same portions as those in the second embodiment shown in FIG.
The wristwatch case 40 of this radio-controlled wristwatch has a configuration in which an insulating spacer member 41 is provided on the outer peripheral portion of the front end of the collar portion 14 of the back cover 6, and the configuration other than this is substantially the same as that of the second embodiment.

すなわち、このスペーサ部材４１は、絶縁性材料からなり、図９に示すように、全体がリング形状に形成されていると共に、断面形状がほぼコ字状に形成されている。この場合、スペーサ部材４１は、その内周面に取付凹部４２が設けられ、この取付凹部４２に裏蓋６の鍔部１４の先端外周面に設けられた嵌合突起４３が嵌合し、これにより裏蓋６の鍔部１４の先端外周部に取り付けられている。また、このスペーサ部材４１は、その上下方向の厚みが裏蓋６の鍔部１４の厚みとほぼ同じに形成されていると共に、その上下面に突起部４４がそれぞれ設けられている。   That is, the spacer member 41 is made of an insulating material, and as shown in FIG. 9, the spacer member 41 is entirely formed in a ring shape and has a substantially U-shaped cross section. In this case, the spacer member 41 is provided with a mounting recess 42 on the inner peripheral surface thereof, and a fitting protrusion 43 provided on the outer peripheral surface of the front end of the collar portion 14 of the back cover 6 is fitted into the mounting recess 42. It is attached to the front-end | tip outer peripheral part of the collar part 14 of the back cover 6. FIG. In addition, the spacer member 41 is formed so that the thickness in the vertical direction is substantially the same as the thickness of the flange portion 14 of the back cover 6, and the protrusions 44 are provided on the upper and lower surfaces, respectively.

これにより、スペーサ部材４１は、リング部材２１の雄ねじ１５がケース本体３の切欠凹部１２の内周面に設けられた雌ねじ１３に螺合すると、図９に示すように、リング部材２１の内周面が裏蓋６の外周面に接触することがなく、裏蓋６の外周面とケース本体３の切欠凹部１２の内周面との間に設けられたリング形状の隙間に挿入し、これによりリング部材２１の上面がスペーサ部材４１を介して裏蓋６の鍔部１４をケース本体３の切欠凹部１２の下面に押し付けて固定するように構成されている。   As a result, when the male screw 15 of the ring member 21 is screwed into the female screw 13 provided on the inner peripheral surface of the notch recess 12 of the case main body 3, the spacer member 41, as shown in FIG. The surface is not in contact with the outer peripheral surface of the back cover 6, and is inserted into a ring-shaped gap provided between the outer peripheral surface of the back cover 6 and the inner peripheral surface of the notch recess 12 of the case body 3, thereby The upper surface of the ring member 21 is configured to press and fix the flange portion 14 of the back cover 6 against the lower surface of the notch recess 12 of the case body 3 via the spacer member 41.

このときには、スペーサ部材４１の上面に設けられた突起部４４によって裏蓋６の鍔部１４の上面とケース本体３の切欠凹部１２の下面とが接触しないように、その両者の間に隙間が設けられると共に、スペーサ部材４１の下面に設けられた突起部４４によって裏蓋６の鍔部１４の下面とリング部材２１の上面とが接触しないように、その両者の間に隙間が設けられる。この場合にも、裏蓋６の鍔部１４の上面とケース本体３の切欠凹部１２の下面との間には、ケース本体３と裏蓋６との間の防水を図る防水パッキン５が設けられている。   At this time, a gap is provided between the upper surface of the flange portion 14 of the back cover 6 and the lower surface of the notch recess 12 of the case body 3 so that the projection 44 provided on the upper surface of the spacer member 41 does not contact the lower surface. In addition, a gap is provided between the lower surface of the collar portion 14 of the back cover 6 and the upper surface of the ring member 21 so that the projection 44 provided on the lower surface of the spacer member 41 does not contact the upper surface of the ring member 21. Also in this case, a waterproof packing 5 is provided between the upper surface of the collar portion 14 of the back cover 6 and the lower surface of the cutout recess 12 of the case body 3 to provide waterproofing between the case body 3 and the back cover 6. ing.

このような腕時計ケース４０においても、ケース本体３と裏蓋６との間、および裏蓋６とリング部材２１との間の両方に跨って絶縁性のスペーサ部材４１が設けられているので、実施形態２と同様、ケース本体３と裏蓋６との間、および裏蓋６とリング部材２１との間の両方の絶縁を図ることができ、これによりアンテナ９で発生した磁界がケース本体３および裏蓋６を通過することによって発生する渦電流、つまりケース本体３と裏蓋６とを還流する渦電流を抑制することができるので、ケース本体３、裏蓋６、およびリング部材２１を金属で形成しても、内部に収容されるアンテナ９の受信感度の低下を防ぐことができる。   Also in such a watch case 40, the insulating spacer member 41 is provided between the case body 3 and the back cover 6 and between the back cover 6 and the ring member 21. As in the second embodiment, both the case main body 3 and the back cover 6 and between the back cover 6 and the ring member 21 can be insulated, whereby the magnetic field generated by the antenna 9 Since the eddy current generated by passing through the back cover 6, that is, the eddy current flowing back through the case body 3 and the back cover 6 can be suppressed, the case body 3, the back cover 6, and the ring member 21 are made of metal. Even if formed, it is possible to prevent a decrease in the reception sensitivity of the antenna 9 accommodated therein.

特に、この腕時計ケース４０では、裏蓋６の鍔部１４の外周に取り付けられたスペーサ部材４１が、ケース本体３と裏蓋６との間、および裏蓋６とリング部材２１との間の両方に跨って設けられているので、リング部材２１を金属で形成しても、スペーサ部材４１によってケース本体３と裏蓋６とがリング部材２１を介して導通するのを防ぐことができ、これによってもアンテナ９に発生した磁界によってケース本体３と裏蓋６とを還流する渦電流を抑制することができるほか、スペーサ部材としての部品点数を最小限に抑えることができ、これにより低コスト化を図ることができる。   In particular, in this watch case 40, the spacer member 41 attached to the outer periphery of the collar portion 14 of the back cover 6 is provided between the case body 3 and the back cover 6 and between the back cover 6 and the ring member 21. Therefore, even if the ring member 21 is made of metal, the case body 3 and the back cover 6 can be prevented from conducting through the ring member 21 by the spacer member 41. In addition to suppressing the eddy current flowing back through the case body 3 and the back cover 6 by the magnetic field generated in the antenna 9, the number of parts as a spacer member can be minimized, thereby reducing the cost. Can be planned.

（実施形態５）
次に、図１０を参照して、この発明を適用した電波腕時計の実施形態５について説明する。この場合にも、図５に示された実施形態２と同一部分に同一符号を付して説明する。
この電波腕時計の腕時計ケース５０は、ケース本体３の切欠凹部１２の下面にスペーサ部材５１を設け、このスペーサ部材５１が裏蓋６の鍔部１４に設けられた貫通孔５２を通して鍔部１４の下側に突出し、この突出した先端部がリング部材２１の上面に当接する構成で、これ以外は実施形態２とほぼ同じ構成なっている。 (Embodiment 5)
Next, with reference to FIG. 10, Embodiment 5 of the radio-controlled wristwatch to which the present invention is applied will be described. Also in this case, the same portions as those in the second embodiment shown in FIG.
In the wristwatch case 50 of this radio-controlled wristwatch, a spacer member 51 is provided on the lower surface of the notch recess 12 of the case main body 3, and the spacer member 51 passes through a through hole 52 provided in the collar portion 14 of the back cover 6 and below the collar portion 14. It protrudes to the side, and the protruding tip is in contact with the upper surface of the ring member 21, and is otherwise substantially the same as in the second embodiment.

すなわち、ケース本体３の切欠凹部１２の内面には、図１０に示すように、スペーサ部材５１が装着する装着溝５３がケース本体３の内周面に沿って連続して設けられている。スペーサ部材５１は、ケース本体３の装着溝５３に装着するリング形状に形成されており、その下面には、複数の突起部５４が下方に突出して設けられている。この場合、裏蓋６の鍔部１４には、図１０に示すように、スペーサ部材５１の複数の突起部５４がそれぞれ挿入する複数の貫通孔５２が設けられている。   That is, as shown in FIG. 10, a mounting groove 53 for mounting the spacer member 51 is continuously provided along the inner peripheral surface of the case body 3 on the inner surface of the cutout recess 12 of the case body 3. The spacer member 51 is formed in a ring shape to be mounted in the mounting groove 53 of the case body 3, and a plurality of protrusions 54 protrude downward from the lower surface thereof. In this case, a plurality of through holes 52 into which the plurality of protrusions 54 of the spacer member 51 are inserted are provided in the collar portion 14 of the back cover 6 as shown in FIG.

これにより、スペーサ部材５１は、リング部材２１の雄ねじ１５がケース本体３の切欠凹部１２の内周面に設けられた雌ねじ１３に螺合すると、図１０に示すように、リング部材２１の内周面が裏蓋６の外周面に接触することがなく、裏蓋６の外周面とケース本体３の切欠凹部１２の内周面との間に設けられたリング形状の隙間に挿入し、これによりリング部材２１の上面がスペーサ部材５１の複数の突起部５４をケース本体３の装着溝５３内に押し付けることにより、裏蓋６の鍔部１４をケース本体３の切欠凹部１２の下面に固定するように構成されている。   Thus, when the male screw 15 of the ring member 21 is screwed into the female screw 13 provided on the inner peripheral surface of the cutout recess 12 of the case main body 3, the spacer member 51, as shown in FIG. The surface is not in contact with the outer peripheral surface of the back cover 6, and is inserted into a ring-shaped gap provided between the outer peripheral surface of the back cover 6 and the inner peripheral surface of the notch recess 12 of the case body 3, thereby The upper surface of the ring member 21 presses the plurality of protrusions 54 of the spacer member 51 into the mounting groove 53 of the case body 3, so that the flange portion 14 of the back cover 6 is fixed to the lower surface of the notch recess 12 of the case body 3. It is configured.

このときには、スペーサ部材５１によって裏蓋６の鍔部１４の上面とケース本体３の切欠凹部１２の下面との接触を防ぐと共に、スペーサ部材５１の下面に設けられた突起部５４が裏蓋６の鍔部１４に設けられた貫通孔５２に挿入して下面側に突出し、この突出した突起部５４の下端部によって裏蓋６の鍔部１４の下面とリング部材２１の上面とが接触しないように、その両者の間に隙間が設けられる。この場合にも、裏蓋６の鍔部１４の上面とケース本体３の切欠凹部１２の下面との間には、ケース本体３と裏蓋６との間の防水を図る防水パッキン５が設けられている。   At this time, the spacer member 51 prevents contact between the upper surface of the flange portion 14 of the back cover 6 and the lower surface of the notch recess 12 of the case body 3, and the protrusion 54 provided on the lower surface of the spacer member 51 has the back cover 6. It is inserted into a through-hole 52 provided in the flange 14 and protrudes to the lower surface side, so that the lower surface of the protruding portion 54 does not contact the lower surface of the flange 14 of the back cover 6 and the upper surface of the ring member 21. A gap is provided between the two. Also in this case, a waterproof packing 5 is provided between the upper surface of the collar portion 14 of the back cover 6 and the lower surface of the cutout recess 12 of the case body 3 to provide waterproofing between the case body 3 and the back cover 6. ing.

このような腕時計ケース５０においても、ケース本体３と裏蓋６との間に絶縁性のスペーサ部材５１が設けられ、裏蓋６とリング部材２１との間にスペーサ部材５１の複数の突起部５４が設けられているので、実施形態２と同様、ケース本体３と裏蓋６との間を絶縁することができ、これによりアンテナ９で発生した磁界がケース本体３および裏蓋６を通過することによって発生する渦電流、つまりケース本体３と裏蓋６とを還流する渦電流を抑制することができるので、ケース本体３、裏蓋６、およびリング部材２１を金属で形成しても、内部に収容されるアンテナ９の受信感度の低下を防ぐことができる。   Also in such a watch case 50, an insulating spacer member 51 is provided between the case body 3 and the back cover 6, and a plurality of protrusions 54 of the spacer member 51 are provided between the back cover 6 and the ring member 21. As in the second embodiment, the case main body 3 and the back cover 6 can be insulated from each other, so that the magnetic field generated by the antenna 9 passes through the case main body 3 and the back cover 6. , That is, the eddy current flowing back through the case main body 3 and the back cover 6 can be suppressed. Therefore, even if the case main body 3, the back cover 6 and the ring member 21 are made of metal, A decrease in reception sensitivity of the antenna 9 accommodated can be prevented.

特に、この腕時計ケース５０では、ケース本体３の切欠凹部１２の内面に取り付けられたスペーサ部材５１が、ケース本体３と裏蓋６との間に設けられていると共に、このスペーサ部材５１の複数の突起部５４が裏蓋６の鍔部１４の貫通孔５２に挿入して下方に突出し、この突出した突起部５４の下端部によって裏蓋６とリング部材２１との間に設けられているので、スペーサ部材５１をケース本体３と裏蓋６との間、および裏蓋６とリング部材２１との間の両方に跨って設けることができ、これによりリング部材２１を金属で形成しても、スペーサ部材５１によってケース本体３と裏蓋６とがリング部材２１を介して導通するのを防ぐことができると共に、実施形態４と同様、スペーサ部材としての部品点数を最小限に抑えることができ、低コスト化を図ることができる。   In particular, in this watch case 50, a spacer member 51 attached to the inner surface of the notch recess 12 of the case body 3 is provided between the case body 3 and the back cover 6, and a plurality of spacer members 51 are provided. Since the protruding portion 54 is inserted into the through hole 52 of the collar portion 14 of the back cover 6 and protrudes downward, and is provided between the back cover 6 and the ring member 21 by the lower end portion of the protruding protrusion 54. The spacer member 51 can be provided across both the case body 3 and the back cover 6 and between the back cover 6 and the ring member 21, so that even if the ring member 21 is formed of metal, the spacer The member 51 can prevent the case body 3 and the back cover 6 from being conducted through the ring member 21 and, like the fourth embodiment, can minimize the number of parts as a spacer member. It is possible to reduce the cost.

（実施形態６）
次に、図１１を参照して、この発明を適用した電波腕時計の実施形態６について説明する。この場合にも、図５に示された実施形態２と同一部分に同一符号を付して説明する。
この電波腕時計の腕時計ケース６０は、裏蓋６の鍔部１４の複数個所にスペーサ部材６１をそれぞれ上下に突出させて設け、このスペーサ部材６１の上端部をケース本体３の切欠凹部１２の下面に当接させ、スペーサ部材６１の下端部をリング部材２１の上面に当接させた構成で、これ以外は実施形態２とほぼ同じ構成なっている。 (Embodiment 6)
Next, with reference to FIG. 11, Embodiment 6 of the radio-controlled wristwatch to which the present invention is applied will be described. Also in this case, the same portions as those in the second embodiment shown in FIG.
The wristwatch case 60 of this radio-controlled wristwatch is provided with a spacer member 61 projecting up and down at a plurality of locations of the collar portion 14 of the back cover 6, and the upper end portion of the spacer member 61 is formed on the lower surface of the notch recess 12 of the case body 3. The configuration is such that the lower end portion of the spacer member 61 is brought into contact with the upper surface of the ring member 21, and the other configuration is substantially the same as in the second embodiment.

この場合、裏蓋６の鍔部１４における複数箇所には、上下に貫通する貫通孔６２がそれぞれ設けられている。スペーサ部材６１は、絶縁性材料からなり、図１１に示すように、それぞれビス形状に形成され、裏蓋６の鍔部１４の複数個所に設けられた貫通孔６２に挿入されて上下に突出して設けられ、これにより上端部がケース本体３の切欠凹部１２の下面に当接して、ケース本体３の切欠凹部１２の下面と裏蓋６の鍔部１４の上面との間に隙間を形成し、下端部がリング部材２１の上面に当接して、リング部材２１の上面と裏蓋６の鍔部１４の下面との間に隙間を形成するように構成されている。   In this case, through holes 62 penetrating vertically are respectively provided at a plurality of locations in the collar portion 14 of the back cover 6. The spacer member 61 is made of an insulating material, and is formed in a screw shape as shown in FIG. 11. The spacer member 61 is inserted into through holes 62 provided at a plurality of positions of the flange portion 14 of the back cover 6 and protrudes up and down. Thus, the upper end abuts on the lower surface of the notch recess 12 of the case body 3 to form a gap between the lower surface of the notch recess 12 of the case body 3 and the upper surface of the collar portion 14 of the back cover 6, The lower end is in contact with the upper surface of the ring member 21, and a gap is formed between the upper surface of the ring member 21 and the lower surface of the flange portion 14 of the back cover 6.

このような腕時計ケース６０においても、ケース本体３と裏蓋６との間、および裏蓋６とリング部材２１との間の両方に絶縁性のスペーサ部材６１が設けられているので、実施形態２と同様、スペーサ部材６１によってケース本体３と裏蓋６との間、および裏蓋６とリング部材２１との間の両方の絶縁を図ることができる。このため、アンテナ９で発生した磁界がケース本体３および裏蓋６を通過することによって発生する渦電流、つまりケース本体３と裏蓋６とを還流する渦電流を抑制することができ、これによりケース本体３、裏蓋６、およびリング部材３１を全て金属で形成しても、内部に収容されるアンテナ９の受信感度の低下を防ぐことができる。   Also in such a watch case 60, since the insulating spacer member 61 is provided between the case body 3 and the back cover 6 and between the back cover 6 and the ring member 21, Embodiment 2 is provided. Similarly, the spacer member 61 can insulate both the case body 3 and the back cover 6 and between the back cover 6 and the ring member 21. For this reason, the eddy current generated when the magnetic field generated by the antenna 9 passes through the case body 3 and the back cover 6, that is, the eddy current flowing back through the case body 3 and the back cover 6 can be suppressed. Even if the case body 3, the back cover 6, and the ring member 31 are all made of metal, it is possible to prevent the reception sensitivity of the antenna 9 housed therein from being lowered.

特に、この腕時計ケース６０では、裏蓋６の鍔部１４の複数個所にスペーサ部材６１をそれぞれ上下に突出させて設け、このスペーサ部材６１の上端部をケース本体３の切欠凹部１２の下面に当接させ、スペーサ部材６１の下端部をリング部材２１の上面に当接させたので、リング部材２１を金属で形成しても、スペーサ部材６１によってケース本体３と裏蓋６とがリング部材２１を介して導通するのを防ぐことができ、これによってもアンテナ９に発生した磁界によってケース本体３と裏蓋６とを還流する渦電流を確実に抑制することができる。   In particular, in this watch case 60, spacer members 61 are provided to protrude vertically at a plurality of positions of the collar portion 14 of the back cover 6, and the upper end portion of the spacer member 61 contacts the lower surface of the notch recess 12 of the case body 3. Since the lower end portion of the spacer member 61 is brought into contact with the upper surface of the ring member 21, the case body 3 and the back cover 6 cause the ring member 21 to be connected to the case member 3 by the spacer member 61 even if the ring member 21 is made of metal. Therefore, the eddy current flowing back through the case body 3 and the back cover 6 by the magnetic field generated in the antenna 9 can be reliably suppressed.

なお、上記実施形態１〜６およびその各変形例では、スペーサ部材８、４１、５１、６１を絶縁性材料で形成した場合について述べたが、必ずしも絶縁性材料で形成する必要はなく、例えば電気抵抗の大きい材料で形成すると共に、ケース本体３と裏蓋６とに接触する面積を小さくすることにより、ケース本体３と裏蓋６との間の電気抵抗を大きくし、これによりアンテナ９で発生した磁界がケース本体３および裏蓋６を通過することによって発生する渦電流、つまりケース本体３と裏蓋６とを還流する渦電流を抑制するように構成しても良い。   In the first to sixth embodiments and their modifications, the case where the spacer members 8, 41, 51, 61 are formed of an insulating material has been described. However, the spacer members 8, 41, 51, 61 are not necessarily formed of an insulating material. The electrical resistance between the case body 3 and the back cover 6 is increased by reducing the area in contact with the case body 3 and the back cover 6 while being formed of a material having high resistance. An eddy current generated by the magnetic field passing through the case body 3 and the back cover 6, that is, an eddy current flowing back through the case body 3 and the back cover 6 may be suppressed.

また、上記実施形態１〜６およびその各変形例では、腕時計に適用した場合について述べたが、必ずしも腕時計である必要はなく、トラベルウオッチ、目覚まし時計、置き時計、掛け時計などの各種の時計に適用することができるほか、これに限らず、携帯電話機、携帯情報端末機などの電子機器にも適用することができる。   Moreover, although the said Embodiment 1-6 and each modification example described the case where it applied to a wristwatch, it does not necessarily need to be a wristwatch, and it applies to various timepieces, such as a travel watch, an alarm clock, a table clock, and a wall clock. In addition, the present invention is not limited to this, and can also be applied to electronic devices such as a mobile phone and a portable information terminal.

この発明を適用した電波腕時計の要部を示した拡大断面図である。（実施形態１）It is the expanded sectional view which showed the principal part of the radio-controlled wristwatch to which this invention is applied. (Embodiment 1) 図１のリング部材を示した平面図である。It is the top view which showed the ring member of FIG. 図１の要部を示した拡大断面図である。It is the expanded sectional view which showed the principal part of FIG. この発明の実施形態１の変形例を示した要部の拡大断面図である。It is an expanded sectional view of the principal part which showed the modification of Embodiment 1 of this invention. この発明を適用した電波腕時計における要部の拡大断面図である。（実施形態２）It is an expanded sectional view of the principal part in the radio wave wristwatch to which this invention is applied. (Embodiment 2) この発明の実施形態２の第１変形例を示した要部の拡大断面図である。It is an expanded sectional view of the principal part which showed the 1st modification of Embodiment 2 of this invention. この発明の実施形態２の第２変形例を示した要部の拡大断面図である。It is an expanded sectional view of the important section showing the 2nd modification of Embodiment 2 of this invention. この発明を適用した電波腕時計における要部の拡大断面図である。（実施形態３）It is an expanded sectional view of the principal part in the radio wave wristwatch to which this invention is applied. (Embodiment 3) この発明を適用した電波腕時計における要部の拡大断面図である。（実施形態４）It is an expanded sectional view of the principal part in the radio wave wristwatch to which this invention is applied. (Embodiment 4) この発明を適用した電波腕時計における要部の拡大断面図である。（実施形態５）It is an expanded sectional view of the principal part in the radio wave wristwatch to which this invention is applied. (Embodiment 5) この発明を適用した電波腕時計における要部の拡大断面図である。（実施形態６）It is an expanded sectional view of the principal part in the radio wave wristwatch to which this invention is applied. (Embodiment 6)

符号の説明Explanation of symbols

１、２０、３０、４０、５０、６０ 腕時計ケース
２ 時計モジュール
３ ケース本体
４ 時計ガラス
５、２４ 防水パッキン
６ 裏蓋
７、２１、３１ リング部材
８、４１、５１、６１ スペーサ部材
９ アンテナ
１２ 切欠凹部
１３ 雌ねじ
１４ 鍔部
１５ 雄ねじ
２２ 補助スペーサ部材
３２ 段差凹部
４４、５４ 突起部 1, 20, 30, 40, 50, 60 Watch case 2 Watch module 3 Case body 4 Watch glass 5, 24 Waterproof packing 6 Back cover 7, 21, 31 Ring member 8, 41, 51, 61 Spacer member 9 Antenna 12 Notch Concave portion 13 Female screw 14 鍔 portion 15 Male screw 22 Auxiliary spacer member 32 Step concave portion 44, 54 Protrusion portion

Claims (3)

内部にアンテナが収容されると共に、下部内周面に切欠凹部が設けられた金属製のケース本体と、
このケース本体の裏側に取り付けられ、外周部が前記切欠凹部に挿入されると共に、外周部の上部に鍔部が外周側に突出して設けられた金属製の裏蓋と、
前記ケース本体の前記切欠凹部の内周面に螺合して前記裏蓋を前記ケース本体に押え付けて固定する金属製のリング部材と、
前記ケース本体と前記裏蓋との間、および前記裏蓋と前記リング部材との間の両方に跨って設けられて、その間を絶縁するためのスペーサ部材と、
前記スペーサ部材より内側の位置で、前記裏蓋の鍔部の上面と前記ケース本体の切欠凹部の下面との間に設けられた防水パッキンと
を備えたことを特徴とする機器ケース。 An antenna is housed inside, and a metal case body provided with a notch recess in the lower inner peripheral surface ;
A metal back cover that is attached to the back side of the case body , the outer peripheral portion is inserted into the notch recess, and the collar portion is provided on the upper portion of the outer peripheral portion so as to protrude to the outer peripheral side ;
A metal ring member that is screwed into the inner peripheral surface of the notch recess of the case body and presses and fixes the back cover to the case body;
A spacer member provided between the case main body and the back cover, and between the back cover and the ring member, for insulating the space;
An apparatus case comprising a waterproof packing provided between the upper surface of the collar portion of the back cover and the lower surface of the notch recess of the case body at a position inside the spacer member . 内部に標準時刻電波を受信するアンテナ及びこのアンテナで受信した標準時刻電波に基づいて時刻修正する時計モジュールが収容されると共に、下部内周面に切欠凹部が設けられた金属製のケース本体と、An antenna that receives a standard time radio wave and a clock module that corrects the time based on the standard time radio wave received by the antenna are housed therein, and a metal case body provided with a notch recess in the lower inner peripheral surface;
このケース本体の裏側に取り付けられ、外周部が前記切欠凹部に挿入されると共に、外周部の上部に鍔部が外周側に突出して設けられた金属製の裏蓋と、A metal back cover that is attached to the back side of the case body, the outer peripheral portion is inserted into the notch recess, and the collar portion is provided at the upper portion of the outer peripheral portion so as to protrude to the outer peripheral side;
前記ケース本体の前記切欠凹部の内周面に螺合して前記裏蓋を前記ケース本体に押え付けて固定する金属製のリング部材と、A metal ring member that is screwed into an inner peripheral surface of the notch recess of the case body and presses and fixes the back cover to the case body;
前記ケース本体と前記裏蓋との間、および前記裏蓋と前記リング部材との間の両方に跨って設けられて、その間を絶縁するためのスペーサ部材と、A spacer member provided between the case body and the back cover and between the back cover and the ring member, for insulating the space;
前記スペーサ部材より内側の位置で、前記裏蓋の鍔部の上面と前記ケース本体の切欠凹部の下面との間に設けられた防水パッキンとA waterproof packing provided between the upper surface of the collar portion of the back cover and the lower surface of the notch recess of the case body at a position inside the spacer member;
を備えたことを特徴とする腕時計ケース。A watch case characterized by comprising: 時計ケース、この時計ケースの内部に収容された標準時刻電波を受信するためのアンテナ及び前記時計ケースの内部に収容され、前記アンテナで受信した標準時刻電波に基づいて時刻を修正する時計モジュールを有し、A watch case, an antenna for receiving a standard time radio wave accommodated in the watch case, and a clock module for correcting the time based on the standard time radio wave received in the watch case and received in the watch case. And
前記時計ケースは、The watch case is
下部内周面に切欠凹部が設けられた金属製のケース本体と、A metal case body provided with a notch recess in the lower inner peripheral surface;
このケース本体の裏側に取り付けられ、外周部が前記切欠凹部に挿入されると共に、外周部の上部に鍔部が外周側に突出して設けられた金属製の裏蓋と、A metal back cover that is attached to the back side of the case body, the outer peripheral portion is inserted into the notch recess, and the collar portion is provided at the upper portion of the outer peripheral portion so as to protrude to the outer peripheral side;
前記ケース本体の前記切欠凹部の内周面に螺合して前記裏蓋を前記ケース本体に押え付けて固定する金属製のリング部材と、A metal ring member that is screwed into an inner peripheral surface of the notch recess of the case body and presses and fixes the back cover to the case body;
前記ケース本体と前記裏蓋との間、および前記裏蓋と前記リング部材との間の両方に跨って設けられて、その間を絶縁するためのスペーサ部材と、A spacer member provided between the case body and the back cover and between the back cover and the ring member, for insulating the space;
前記スペーサ部材より内側の位置で、前記裏蓋の鍔部の上面と前記ケース本体の切欠凹部の下面との間に設けられた防水パッキンとA waterproof packing provided between the upper surface of the collar portion of the back cover and the lower surface of the notch recess of the case body at a position inside the spacer member;
を備えていることを特徴とする電波時計。A radio-controlled timepiece characterized by comprising:
JP2006204120A 2006-07-27 2006-07-27 Equipment case, watch case and radio clock Active JP4595901B2 (en)

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